Category
Evidence
What the trials measured, what they found, and how confident anyone is entitled to be about it.
Last reviewed August 2026. We update a page when the underlying evidence changes, not on a schedule.
Evidence · 9 min read
Do blue light glasses work? What 17 randomised trials found
The Cochrane review pooled every usable trial and came back with an uncomfortable answer for the industry. Here is what it measured, what it could not measure, and what that means for you.
Evidence · 10 min read
Do blue light glasses help you sleep?
Evening light genuinely shifts your body clock. Whether a pair of amber glasses does enough to change your sleep is a different question, and the trials are small.
Evidence · 8 min read
How do blue light glasses work?
Coating versus embedded tint, what a "blocks 90% of blue light" claim can legitimately mean, and why two lenses with the same number can behave completely differently.